The MiCS-VZ-89TE is an integrated sensor board for Indoor Air Quality monitoring.

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1 1 MiCS-VZ9TE_ E-1016 The is an integrated sensor board for Indoor Air Quality monitoring. The combines state-of-the-art MOS sensor technology with intelligent detection algorithms to monitor tvocs and CO2 equivalent variations in confined spaces, e.g. meeting rooms or vehicle cabins. The dual signal output can be used to control ventilation on-demand, saving energy and reducing cost-ofownership. Features Calibration-free Low power Wide VOCs detection range High sensitivity High resistance to shocks and vibrations Conversion from PWM output signal of MICS-VZ-89TE to equivalent Carbon Dioxide concentration in ppm Detectable gases Volatile Organic Compounds Equivalent Carbon Dioxide VOCs CO 2 (equiv) Conversion from PWM output signal of MICS-VZ-89TE to equivalent tvoc concentration in ppb Comparison between MICS-VZ-89TE output signal and NDIR CO2 sensor signal over a duration of 4 consecutive days (Thu Sun) Page 1 of 5

2 2 MiCS-VZ9TE_ E-1016 Performance Detection Method Monitoring Range PWM Output I2C Output Response Time Refresh Output Frequency Semiconductor gas sensor, detecting a wide range of VOCs ppm equivalent CO ppb isobutylene equivalent tvocs Pin 1 : TTL output 30Hz +/-1%, Range 5 95%, duty cycle 3.3V Use a pull-up resistance between Pin 1 and Pin 6 Pull-up value: typ. 10kOhms for 3.3V operation Pin 2 and 4 : Pull-up of 4.7 kohms on master SDA and SCL Equivalent to conventional NDIR-CO2 sensors < 5 seconds for tvoc 1 Hz Operation Supply Voltage 3.3V DC regulated +/- 5% Operating Power 125 mw Warm-up Time 15 min Operating Temperature 0 C to 50 C Operating Humidity 0%RH to 95%RH (non condensing) Storage Temperature -40 C to 80 C Storage Humidity 0%RH to 95%RH (non condensing) IMPORTANT PRECAUTIONS Read the following instructions carefully before using the indoor air quality sensor described in this document to avoid erroneous readings and to prevent the device from permanent damage. The sensor must not be exposed to high concentrations of organic solvents, ammonia, silicone vapour or cigarette-smoke in order to avoid poisoning the sensitive layer. The sensor should be protected against water and dust projections. SGX strongly recommends using ESD protection equipment to handle the sensor. For any additional questions, contact SGX Sensortech Page 2 of 5

3 3 MiCS-VZ9TE_ E Power-on Self-Test Parameter Criteria Failed Diagnostic Indicator Sensor Resistance Range Range Check PWM < 5 % at Power ON Sensor Operating Power Range Check PWM < 5 % at Power ON PWM Output After Power-on self-test (2 seconds), the device will provide either a single Failed Diagnostic Level in case of sensor failure of the sensor or PWM multiplexed output indicating CO_ equivalent_ Level and VOC _isobutylene_equivalent Level referred to the isobutylene sensitivity unit.. A simple manner to test the reactivity and sensitivity of gas sensor is to expose to alcohol bottleneck for example. CO2 equ [ppm] PWM Output [%] VOC (isobutylene) [ppb] PWM Output [%] PWM 80% 33.3 ms 1/T = 30 Hz PWM 30% tvoc from 5% to 45% CO2 equ from 55% to 95% Page 3 of 5

4 4 MiCS-VZ9TE_ E-1016 Output Out of this initial period, the device will have the I2C data CO2 equivalent [ppm] and tvoc equivalent referred to the isobutylene sensitivity unit [ppb]. D1: Data_byte_1: tvoc: [13 242] -> tvoc [ppb] = (D1-13) * (1000/229) D2: Data_byte_2: CO2_equ: [13 242] -> CO2_equ [ppm] = (D2-13) * (1600/229) D3: Data_byte_3: RS first byte(msb) -> Resistor value [W] = 10*(D5+ (256*D4) + (65536*D3)) D4: Data_byte_4: RS second byte D5: Data_byte_5: RS third byte(lsb) MiCS-VZ-86 Output D6: Status D7: CRC Page 3 of 5

5 5 MiCS-VZ9TE_ E-1016 Package outline dimensions The is available as PCB and can be mounted with a M2.5 screw in appliances. Connections are made with soldering on card edge (cut via connector) Pin Connection VZ-89TE 6:+ 3.3V 5: NC 4: SDA 1: PWM OUT 2: SCL 3: GND Product nomenclature Page 5 of 5

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